Mind

And when he is out of sight, quickly also is he out of mind.

We grow gray in our spirit long before we grow gray in our hair.

He who doesn't lose his wits over certain things has no wits to lose

To read means to borrow; to create out of one's readings is paying off one's debts

Erudition can produce foliage without bearing fruit.

We cannot remember too often that when we observe nature, and especially the ordering of nature, it is always ourselves alone we are observing

Nothing is more conducive to peace of mind than not having any opinions at all

The worst thing you can possibly do is worrying and thinking about what you could have done

Logic is the anatomy of thought

Sit in reverie, and watch the changing color of the waves that break upon the idle seashore of the mind

A wise man seeks wisdom; a madman thinks that he has found it.

One can only learn his powers of action by action, and his powers of thought by thinking

Whether you think you can or think you can't, either way you are right

Common sense and a sense of humor are the same thing, moving at different speeds. A sense of humor is just common sense, dancing

Human beings can alter their lifes by altering their attitudes of mind.

In the dim background of mind we know what we ought to be doing but somehow we cannot start.

Books serve to show a man that those original thoughts of his aren’t very new after all.

Agriculture for an honorable and high-minded man, is the best of all occupations or arts by which men procure the means of living

Babies are always more trouble than you thought -- and more wonderful.

Willpower is to the mind like a strong blind man who carries on his shoulders a lame man who can see